Introduction to Computer Networking学习笔记(十):error detection 错误探查 Checksum、CRC、MAC,程序员大本营,技术文章内容聚合第一站。
BURST ERRORS: A burst error looks like E=000...000111...11110000...00. That is, E consists of all zeros except for a run of 1s somewhere inside. This can be recast as E=(10000...00)(1111111...111) where there are z zeros in the LEFT part and n ones in the RIGHT part. To...
the poly used in the reflected algorithm was actually identical to that used in the non-reflected algorithm; all that had happened is that the bytes had effectively been reflected. As
Consequently, a redundancy code check (CRC) is calculated in the register by the processing of the N-th bit in the case of N-byte data. The operation is performed for every n bits (n>1) in this constitution to not only shorten the operation time of about 1/n but also simplify ...
param[in] none param[out] none retval none */intmain(void){//systick initsysTick_init();//usart init 115200 8-N-1com_init(COM1,115200,0,1);printf("CRC Test \\n");/* Enable CRC clock */rcu_periph_clock_enable(RCU_CRC);/* Compute the CRC of "DataBuffer" */CRCValue =crc_...
Unfortunately, this possibility is completely unavoidable and the best that can be done is to minimize its probability by increasing the amount of information in the checksum (e.g. widening the checksum from one byte to two bytes). Other error detection techniques exist that involve performing ...
1.Application of CRC in VSR system;循环冗余校验在VSR系统中的应用 2.Implementation of parallel CRC based on FPGA基于FPGA的循环冗余校验并行实现 3.The Design of CRC Based on CPLD基于CPLD的循环冗余校验码的实现 4.Application of CRC Implementation with Software in the Wireless Detection System循环冗余...
Error Detection Logic SRAM Bits CRC_ERROR (Shown in BIDIR Mode) VCC Logic Array c l k s h i f t n l d r e g o u t c r c e r r o r 100 MHz or 80 MHz Internal Chip Oscillator 表5. CRC 模块输入和输出端口 端口 输入和输出 定义 输入 CRC 模块的唯一标识符,对于给定描述语言...
Pop! <--| | | | |<-- bitstring with W zero bits added, in this case 32 +---+---+---+---+ 1<--- 32 bits ---> this is the poly, 4*8 bits (figure 1) 这是一个你用来存放暂时CRC结果的记存器,现在我称它为CRC记存器或者记存器.你从右 ...
CRC校验是用于检测一帧数据发送是否正确,只有确认对错的作用,并没有纠错的能力。 还有一点就是CRC校验通过了,并不代表这个数据肯定就是正确的,只能说尽可能减少出错的概率,当然 CRC错了那么这个数据肯定是不正确的。 而这个概率是跟CRC的位数相关,也跟选择的多项式有关,大致可以理解为CRC8,就是1/(28),CRC16则...